Heater



March 17, 1931. T. F. O'BRIEN HEATER Filed Dec. 15, 1928 ATTORNE Patented Mar. 17, 1931 UNITED STATES PATENT OFFICE HEATER Application filed December 15, 1928.

This invention relates to an improved heater and is adapted particularly as a foot warmer to be used for Warming beds of infants, invalids or others requiring such warming. 7

The device is designed to operate economically as an ordinary incandescent bulb such as a ten watt lamp is sufficient for the purpose. The absence of resistance coils diminisheg the cost of operation and also guards against overheating or short-circuiting of the heater. The invention also has means for using the light from the lamp to enable the deviceto furnish sulfieient light in a room for locating articles and for attending the sick or children without a glare or bright illumination of the whole room.

The device is of convenient size and is designed to radiate suflicient heat to be comfortable and no more.

This makes the device of great convenience in the sick room where it can be used both as heater and as a lamp as the illumination is not strong enough to disturb a sleeper and the opening and closing of the shutter of the device is noiseless and no clicking or snapping of a switch is necessary. It also is well adapted for use in the care of infants for the same reason.

The drawing illustrates one embodiment of my invention and in said drawing Figure 1 a side view of my improved heater with an electrical connection indicated. Figure 2 is a central longitudinal section on line 22 in Figure 1. Figure 3 is an enlarged cross-section in line 3-3 in Figure 2. Figure 4 is an end view of Figure 1, illustrating one form of shutter.

The envelope 10 can be of any desirable shape and I show one of cylindrical form and it is usually made of bakelite or similar material, smooth to the touch and easily kept clean as it can be washed. At one end is an end-piece 11 which is fastened in a suitable manner as by the ferrule 12 which is also used to support a socket 13 of the usual form to receive an electric light bulb 14. I find that an ordinary 10 watt lamp is ample for all ordinary foot-warming or for bed warming purposes. The envelope 10is provided Serial No. 326,185.

niiesn metal screen such as used for mosquito ne 111g well adapted for the purpose. This carries the heat to all parts of the envelope and the envelope is substantially of the same temperature from one end to the other. To prevent actual contact of the distributor with the envelope insert a shield 17 usually made of corrugated material such as asbestos. This shield prevents the envelope from get tin g too hot and thus prevents excessive heating such as would be uncomfortable or might ause burning or blistering.

On the end of the envelope opposite the end-piece 11 I arrange a shutter and the form shown comprises a disc 18 fixed in place and a rotatable disk 19 secured by a pin 20. The disk 18 has perforations 21 and the disk 17 has perforations 22 which can be made to register by the rotation of disk 19. This provides for a regulation of the amount of light to be made available and also for completely shutting ol the light.

The device is portable and can be connected to any ordinary socket by means of the cord 23 and the plug 24.

Various changes can be made in the construction of "the article without departing from the scope of the invention.

I claim:

A heater comprising an outer cylindrical still envelope to radiate neat, an incandescent bulb supported inside the envelope, a metal mesh screen surrounding the bulb for distributing the heat from the bulb and a shield disposed between the screen and the envelope to facilitate the above distribution and delay direct transmission of heat from the screen to the envelope.

In testimony whereof he alllxes his signature.

TIMOTHY F. OBRIEN. 

